Adding floors above existing buildings — applied to London Borough of Hackney in the Greater London. With intensive Gateway 3 sign-off and HRB oversight and an average build cost of £2900/sqm, the deal arithmetic for airspace & Rooftop Development here is distinct from neighbouring boroughs.
Heads up: London Borough of Hackney operates Article 4 directions, so airspace & Rooftop Development that would normally be permitted development will likely require a full planning application here. Build that into your timeline and risk model.
Run any Greater London listing through Scapely to get a property-specific build cost, council objection-risk score and the Roof-Loading & PD Eligibility Check overlay applied to London Borough of Hackney's policy environment.
More on Airspace & Rooftop Development · More on London Borough of Hackney